title: Polarization-dependent photon switch in a one-dimensional coupled-resonator waveguide.
abstract: Polarization-dependent photon switch is one of the most important ingredients in building future large-scale all-optical quantum network. We present a scheme for a single-photon switch in a one-dimensional coupled-resonator waveguide, where N(a) Λ-type three-level atoms are individually embedded in each of the resonator. By tuning the interaction between atom and field, we show that an initial incident photon with a certain polarization can be transformed into its orthogonal polarization state. Finally, we use the fidelity as a figure of merit and numerically evaluate the performance of our photon switch scheme in varieties of system parameters, such as number of atoms, energy detuning and dipole couplings.
authors.forename: Zhe-Yong
authors.initials: ZY
authors.lastname: Zhang
authors.forename: Yu-Li
authors.initials: YL
authors.lastname: Dong
authors.forename: Sheng-Li
authors.initials: SL
authors.lastname: Zhang
authors.forename: Shi-Qun
authors.initials: SQ
authors.lastname: Zhu